One poet Whitman's lawless line did directly influence; and this was Maeterlinck, whose rhymeless verse in Serres Chaudes was written under the inspiration of Leaves of Grass.
"Life and Writings of Maurice Maeterlinck"
Jethro Bithell
Whatever value the book may have as poetry, the rhymeless poems in it have, as we have seen, considerable importance as being attempts to reproduce Walt Whitman's manner.
"Life and Writings of Maurice Maeterlinck"
Jethro Bithell
Mr. Locock speaks of line 124 as 'a rhymeless line.
"The Complete Poetical Works of Percy Bysshe Shelley Volume III"
Percy Bysshe Shelley Edited by Thomas Hutchinson, M. A.